Construction of concrete roofs



Apr. 17, 1923.

W. E. CLIFTON ET AL CONSTRUCTION OF CONCRETE ROOFS FiledUune' 27 1921 Patented l7, 1923 UNITED STATES PATENT OFFICE,

WILLIAM ERNEST cLrr'roN AND JOHN STUR'IQN EWART; or NOTTINGHAM, ENGLAND, ASSIGNOBS TO THE CLIFTON-EWART CONSTRUCTION COMPANY LIMITED, or NOT- TING-HAM, ENGLAND.

CONSTRUCTION OF CONCRETE ROOFS.

Application filed June 27, 1921. I Serial No.-4so,s44.

(GRANTED UNDER THE PROVISIONS OF THE ACT OF MARCH 3, 1921, 1-1 STAT. L., 1313.)

To. (ZZZ whom it may concern:

Be it known that we, WILLIAM ERNnsr CLIFTONa-nd JOHN STURTON EWART, subjects of the King of England, both residing in Nottingham, England, have invented certain new and useful Improvements 1n the Construction of Concrete Roots (tor which we have filed an application in Great Britain September 24, 1919,Patent No. 155,385), of .which the following is a specification.

This invention relates to improvements in form a complete roofing, each member being long enough to extend from one princlpalto an adjacent principal and to be supported thereby, whereby the use of rafters between the principals is obviated.

A perspective view of a roof construction according to theinvention is illustrated in the accompanying drawing.

in the roof construction. shown in the drawing the angle section members A of re;

inforced concrete are all laid inaninverted, position, parallel to the ridge of the roof, the angle C of each is on the upper side, and the lower edge of the upper web of each overlaps the angle C of one below it. At the ridge, the space between the two upper members is closed in by means of a cap Grf All the members A are of the same L- section and each is supported by two principals of inverted V-shape, one at each end of the members A.

Vhat we claim as our invention and desire to secure by Letters Patent is 1. In a roof, the combination of two prinuppermost, each member having onev limb which is spaced away fromthe correspondmg limb of the adjacent members and is supported by its free edge at its two. ends only on said principals, and each member except an end one 1n the row having its other limb overlapping the angle-of the member below it, and the length of each member measured inthe direction in which it extends between the principals being great 1n relation to its measurement at right angles thereto.

2. A roof, comprising'in combination two 1n'incipals of inverted V-shape, and two sets of longitudinal reinforced concrete members all or the same L-section, the members in each set being arranged in a row parallel with the roof ridge and parallel onewith another with their angles directed upwards, one set on each slanting side at 1311613111101 pals,, each member in one set having one limb spaced away from the corresponding limb of the adjacent members and supported by its free edge at its two ends only by said princlpals, and each member in each set except an end one in the row having its-other limb overlapping the angle of the member below it in the same set, and an inverted V-shaped longitudinal reinforced concrete member arranged parallel with said members of L- section and having its limbs resting respectively upon the upper end members of the two rows of members. mIn testimony whereof we have signed our names to thisspecification in the presence of two subscribing witnesses.

WILLIAM ERNEST CLIFTON JOHN STURTON EWART.

Witnesses:

3 GHAs'Loms NoRDoN, ALFRED HORNER. 

